Organic Light-Emitting Diodes Driven by Organic Transistors

Organic thin-film field-effect transistors (OTFTs) with pentacene as the semiconductor have been fabricated for driving an organic light-emitting diode (OLED). The driving circuit includes two OTFTs and one storage capacitor. The field-effect mobility of the transistors in the driving circuit is more than 0.3 cm 2 /Vs, and the on/off ratio is larger than 10 4 . The light-emission area of the OLED is 0.04 mm 2 and the brightness is larger than 400 cd/m 2 when the selected line voltage, data line voltage and drive voltage all are -40 V. The responding characteristics and holding characteristics are also researched when the selected line voltage and the date line voltage are changed.